Water tube boiler



Jan. 24, 1933. GARBE' 1,894,988

WATER TUBE BOILER Filed March 19, 1951 Patented Jan. 24, 1933 STATES UNHTE HERMAN GAB/BE, OF GLOGAU, GER-MANY WATER TUBE BOILER Application filed March 19, 1931, Serial No. 523,702, and in Germany March 19, 1930.

My inventionrelates to water-tube boilers of the type comprising inclined tubes which through risers are connected to upper drums.

The object of the invention is to produce a forced and uninterrupted water circulation which I accomplish by so designing and arranging the various elements of the boiler that the water-steam current has a free and unhindered flow without being in any way choked or impeded, and furthermore by so distributing the heating surfaces that a flow in one direction only is insured.

For a complete understanding of my invention, I refer to the annexed drawing, in

which, by way of illustration, I have shown an embodiment of the invention and in which Fig. 1 is a diagrammatic side-view of the new boiler and Fig. 2 a rear end view, while Fig. 8 shows a detail.

On the drawing, the inclined water-tubes are shown at a. At the front of the boiler, each of these tubes terminates in a head I). These heads are each connected by a riser 0 with the forward upper drum 0! into which can freely flow the water-steam current passing upwards through the risers 0. At k are shown normal connecting tubes connecting the forward upper drum cl with the rear upper drum 0, to which the feed-water is supplied. At f are shown vertical descend- 7 ing tubes, through which the feed water passes into the various separate headers shown at g. Because of this arrangement, only a small portion of the descending tubes f is exposed to the heating gases, as clearly appears from Fig. 1. The said tubes being thus located in a comparatively cool zone, while the risers 0 are exposed to the hottest gases, a regular water circulation in one di- 0 rection is insured.

Furthermore, the descending tubes f be ing connected to separate headers 9 into which terminate the inclined water-tubes a, the tube caps, or joints, are easilyaccessible,

and can be readily inspected.

Fig. 3 shows on an enlarged scale one of the heads 6 into the walls of which the front end of an inclined tube a and the lower end of a riser c are beaded. At It is shown a cap closing the front wall of said head. Since this front wall is disposed in an inclined or oblique position relative to the longitudinal axis of the inclined tube a, itwill be readily seen from an inspection of Fig. 3 that after the removal of the cap h, both the inclined tube a and the riser 0 can be beaded into the walls of the head I) with a normal straight header, and likewise, the tubes are readily accessible to be cleaned, or exchanged.

Of course, my invention is in no way lim- 6 ited to the construction shown in the draw ing, and various modifications may be made without a departure from the gist of the invention.

I claim:

1. In a water-tube boiler, the combination with an upper drum, of inclined water-tubes disposed in vertical rows, risers connecting the forward ends of said inclined water-tubes to said upperdrum, said risers being located 7 between the vertical rows of said inclined tubes, a plurality of separate headers receiving the rear ends of said inclined water-tubes ahead interposed between the forward end of each water-tube and the lower end of the cor- 7 responding riser, and descending tubes connected to, said headers and being disposed outside of the rows of said inclined tubes.

2. In a water-tube boiler, downwardly and rearwardly inclined water tubes, a drum located above said tubes, a riser individual to each tube connecting the front end thereof with said drum, connections between said drum and the rear ends of said tubes, and a head individual to each tube and its riser through which each tube is connected with its related riser, each head having angularly disposed walls through which the related tube and riser extend, and each head further having a wall inclined with respect to both of said first mentioned walls and provided with a normally closed opening which when uncovered affords access through the head to both the tube and the riser.

In testimony whereof I aifix my signature.

HERMAN GARBE. 

